but hillary never backed down. >> shame you, barack obama. >> even when campaigning got ugly. not long after that, clinton welled up at the new hampshire diner and ran away with the primary. another victory. in the end, she conceded, wrapping up her historic presidential bid. >> although we weren't able to shatter that highest, hardest glass ceiling this time -- >> her persistence and passion convinced the man she tried to beat to cast her on the world stage. >> in her, you will have a secretary of state who has my full confidence. >> the former first lady and senator from new york would become madam secretary in 2009. yet now, a millionaire miles and 112 countries later, she finds herself entangled in one final controversy. >> i'm in charge of the state department, 60,000-plus people all over the world, 275 posts. >> testifying it who knew what when in light of the attack on the compound in benghazi. but if history is any guide, hillary clinton may emerge unscathed once again and reinvent herself. now it's not clear exactly when clinton will relinquish her post at the state d